package String;

/**
 * String toUpperCase()
 * String toLowerCase()


 */

public class ToUpperCaseDemo {
    public static void main(String[] args) {
        String line = "我爱java";
        String upper1 = line.toUpperCase();
        System.out.println(upper1);

        String lower1 = line.toLowerCase();
        System.out.println(lower1);
    }
}
